Three20
Three20 is an Objective-C library for iPhone developers
three20 is a historically significant iOS framework originally extracted from Facebook’s app, providing a broad set of utilities and UI components for early iPhone development. It introduced a URL-based navigation system, image/caching pipelines, styled text labels, and a photo browser that many apps adopted before iOS shipped similar features. The library championed modularity with packages you could include piecemeal, helping teams standardize networking, model objects, and table view stylings. ...